From patchwork Wed Jul 19 02:14:06 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Phil Reid X-Patchwork-Id: 9850321 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 175CC601C8 for ; Wed, 19 Jul 2017 02:14:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F3BD82867F for ; Wed, 19 Jul 2017 02:14:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E87992869A; Wed, 19 Jul 2017 02:14:42 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1491D2867F for ; Wed, 19 Jul 2017 02:14:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752670AbdGSCOe (ORCPT ); Tue, 18 Jul 2017 22:14:34 -0400 Received: from anchovy2.45ru.net.au ([203.30.46.146]:34074 "EHLO anchovy.45ru.net.au" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751560AbdGSCOY (ORCPT ); Tue, 18 Jul 2017 22:14:24 -0400 Received: (qmail 27217 invoked by uid 5089); 19 Jul 2017 02:14:20 -0000 Received: by simscan 1.2.0 ppid: 27086, pid: 27090, t: 0.0698s scanners: regex: 1.2.0 attach: 1.2.0 clamav: 0.88.3/m:40/d:1950 X-RBL: $rbltext Received: from unknown (HELO preid-centos7.electromag.com.au) (preid@electromag.com.au@203.59.230.133) by anchovy3.45ru.net.au with ESMTPA; 19 Jul 2017 02:14:19 -0000 Received: by preid-centos7.electromag.com.au (Postfix, from userid 1000) id 37D56330E6578; Wed, 19 Jul 2017 10:14:15 +0800 (AWST) From: Phil Reid To: wsa@the-dreams.de, robh+dt@kernel.org, mark.rutland@arm.com, sre@kernel.org, jdelvare@suse.com, jglauber@cavium.com, david.daney@cavium.com, peda@axentia.se, preid@electromag.com.au, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-pm@vger.kernel.org, benjamin.tissoires@redhat.com Subject: [PATCH v9 4/9] i2c: mux: pca954x: Call request irq after adding mux segments Date: Wed, 19 Jul 2017 10:14:06 +0800 Message-Id: <1500430451-43858-5-git-send-email-preid@electromag.com.au> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1500430451-43858-1-git-send-email-preid@electromag.com.au> References: <1500430451-43858-1-git-send-email-preid@electromag.com.au> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The pca954x device do not have the ability to mask interrupts. For i2c slave devices that also don't have masking ability (eg ltc1760 smbalert output) delay registering the irq until after the mux segments have been configured. During the mux add_adaptor call the core i2c system can register an smbalert handler which would then be called immediately when the irq is registered. This smbalert handler will then clear the pending irq. Signed-off-by: Phil Reid Acked-by: Peter Rosin --- drivers/i2c/muxes/i2c-mux-pca954x.c | 53 +++++++++++++++++-------------------- 1 file changed, 25 insertions(+), 28 deletions(-) diff --git a/drivers/i2c/muxes/i2c-mux-pca954x.c b/drivers/i2c/muxes/i2c-mux-pca954x.c index f1751c2..9867720 100644 --- a/drivers/i2c/muxes/i2c-mux-pca954x.c +++ b/drivers/i2c/muxes/i2c-mux-pca954x.c @@ -294,7 +294,7 @@ static int pca954x_irq_setup(struct i2c_mux_core *muxc) { struct pca954x *data = i2c_mux_priv(muxc); struct i2c_client *client = data->client; - int c, err, irq; + int c, irq; if (!data->chip->has_irq || client->irq <= 0) return 0; @@ -314,24 +314,22 @@ static int pca954x_irq_setup(struct i2c_mux_core *muxc) handle_simple_irq); } - err = devm_request_threaded_irq(&client->dev, data->client->irq, NULL, - pca954x_irq_handler, - IRQF_ONESHOT | IRQF_SHARED, - "pca954x", data); - if (err) - goto err_req_irq; + return 0; +} - disable_irq(data->client->irq); +static void pca954x_cleanup(struct i2c_mux_core *muxc) +{ + struct pca954x *data = i2c_mux_priv(muxc); + int c, irq; - return 0; -err_req_irq: - for (c = 0; c < data->chip->nchans; c++) { - irq = irq_find_mapping(data->irq, c); - irq_dispose_mapping(irq); + if (data->irq) { + for (c = 0; c < data->chip->nchans; c++) { + irq = irq_find_mapping(data->irq, c); + irq_dispose_mapping(irq); + } + irq_domain_remove(data->irq); } - irq_domain_remove(data->irq); - - return err; + i2c_mux_del_adapters(muxc); } /* @@ -417,6 +415,15 @@ static int pca954x_probe(struct i2c_client *client, goto fail_del_adapters; } + if (data->irq) { + ret = devm_request_threaded_irq(&client->dev, data->client->irq, + NULL, pca954x_irq_handler, + IRQF_ONESHOT | IRQF_SHARED, + "pca954x", data); + if (ret) + goto fail_del_adapters; + } + dev_info(&client->dev, "registered %d multiplexed busses for I2C %s %s\n", num, data->chip->muxtype == pca954x_ismux @@ -425,25 +432,15 @@ static int pca954x_probe(struct i2c_client *client, return 0; fail_del_adapters: - i2c_mux_del_adapters(muxc); + pca954x_cleanup(muxc); return ret; } static int pca954x_remove(struct i2c_client *client) { struct i2c_mux_core *muxc = i2c_get_clientdata(client); - struct pca954x *data = i2c_mux_priv(muxc); - int c, irq; - - if (data->irq) { - for (c = 0; c < data->chip->nchans; c++) { - irq = irq_find_mapping(data->irq, c); - irq_dispose_mapping(irq); - } - irq_domain_remove(data->irq); - } - i2c_mux_del_adapters(muxc); + pca954x_cleanup(muxc); return 0; }